<template>
  <div>
    <el-row>
      <el-col :span="24">
        <el-steps :active="step" finish-status="success">
          <el-step title="基本信息"></el-step>
          <el-step title="规格参数"></el-step>
          <el-step title="销售属性"></el-step>
          <el-step title="SKU信息"></el-step>
          <el-step title="保存完成"></el-step>
        </el-steps>
      </el-col>
      <el-col :span="24" v-show="step==0">
        <el-card class="box-card" style="width:80%;margin:20px auto">
          <el-form ref="spuBaseForm" :model="spu" label-width="120px" :rules="spuBaseInfoRules">
            <el-form-item label="商品名称" prop="spuName">
              <el-input v-model="spu.spuName"></el-input>
            </el-form-item>
            <el-form-item label="商品描述" prop="spuDescription">
              <el-input v-model="spu.spuDescription"></el-input>
            </el-form-item>
            <el-form-item label="选择分类" prop="catalogId">
              <category-cascader></category-cascader>
            </el-form-item>
            <el-form-item label="选择品牌" prop="brandId">
              <brand-select></brand-select>
            </el-form-item>
            <el-form-item label="商品重量(Kg)" prop="weight">
              <el-input-number v-model.number="spu.weight" :min="0" :precision="3" :step="0.1"></el-input-number>
            </el-form-item>
            <el-form-item label="设置积分" prop="bounds">
              <label>金币</label>
              <el-input-number
                style="width:130px"
                placeholder="金币"
                v-model="spu.bounds.buyBounds"
                :min="0"
                controls-position="right"
              ></el-input-number>
              <label style="margin-left:15px">成长值</label>
              <el-input-number
                style="width:130px"
                placeholder="成长值"
                v-model="spu.bounds.growBounds"
                :min="0"
                controls-position="right"
              >
                <template slot="prepend">成长值</template>
              </el-input-number>
            </el-form-item>
            <el-form-item label="商品介绍" prop="decript">
              <multi-upload v-model="spu.decript"></multi-upload>
            </el-form-item>

            <el-form-item label="商品图集" prop="images">
              <multi-upload v-model="spu.images"></multi-upload>
            </el-form-item>
            <el-form-item>
              <el-button type="success" @click="collectSpuBaseInfo">下一步：设置基本参数</el-button>
            </el-form-item>
          </el-form>
        </el-card>
      </el-col>
      <el-col :span="24" v-show="step==1">
        <el-card class="box-card" style="width:80%;margin:20px auto">
          <el-tabs tab-position="left" style="width:98%">
            <el-tab-pane
              :label="group.attrGroupName"
              v-for="(group,gidx) in dataResp.attrGroups"
              :key="group.attrGroupId"
            >
              <!-- 遍历属性,每个tab-pane对应一个表单，每个属性是一个表单项  spu.baseAttrs[0] = [{attrId:xx,val:}]-->
              <el-form ref="form" :model="spu">
                <el-form-item
                  :label="attr.attrName"
                  v-for="(attr,aidx) in group.attrs"
                  :key="attr.attrId"
                >
                  <el-input
                    v-model="dataResp.baseAttrs[gidx][aidx].attrId"
                    type="hidden"
                    v-show="false"
                  ></el-input>
                  <el-select
                    v-model="dataResp.baseAttrs[gidx][aidx].attrValues"
                    :multiple="attr.valueType == 1"
                    filterable
                    allow-create
                    default-first-option
                    placeholder="请选择或输入值"
                  >
                    <el-option
                      v-for="(val,vidx) in attr.valueSelect.split(';')"
                      :key="vidx"
                      :label="val"
                      :value="val"
                    ></el-option>
                  </el-select>
                  <el-checkbox
                    v-model="dataResp.baseAttrs[gidx][aidx].showDesc"
                    :true-label="1"
                    :false-label="0"
                  >快速展示
                  </el-checkbox>
                </el-form-item>
              </el-form>
            </el-tab-pane>
          </el-tabs>
          <div style="margin:auto">
            <el-button type="primary" @click="step = 0">上一步</el-button>
            <el-button type="success" @click="generateSaleAttrs">下一步：设置销售属性</el-button>
          </div>
        </el-card>
      </el-col>
      <el-col :span="24" v-show="step==2">
        <el-card class="box-card" style="width:80%;margin:20px auto">
          <el-card class="box-card">
            <div slot="header" class="clearfix">
              <span>选择销售属性</span>
              <el-form ref="saleform" :model="spu">
                <el-form-item
                  :label="attr.attrName"
                  v-for="(attr,aidx) in dataResp.saleAttrs"
                  :key="attr.attrId"
                >
                  <el-input
                    v-model="dataResp.tempSaleAttrs[aidx].attrId"
                    type="hidden"
                    v-show="false"
                  ></el-input>
                  <el-checkbox-group v-model="dataResp.tempSaleAttrs[aidx].attrValues">
                    <el-checkbox
                      v-if="dataResp.saleAttrs[aidx].valueSelect != ''"
                      :label="val"
                      v-for="val in dataResp.saleAttrs[aidx].valueSelect.split(';')"
                      :key="val"
                    ></el-checkbox>
                    <div style="margin-left:20px;display:inline">
                      <el-button
                        v-show="!inputVisible[aidx].view"
                        class="button-new-tag"
                        size="mini"
                        @click="showInput(aidx)"
                      >+自定义
                      </el-button>
                      <el-input
                        v-show="inputVisible[aidx].view"
                        v-model="inputValue[aidx].val"
                        :ref="'saveTagInput'+aidx"
                        size="mini"
                        style="width:150px"
                        @keyup.enter.native="handleInputConfirm(aidx)"
                        @blur="handleInputConfirm(aidx)"
                      ></el-input>
                    </div>
                  </el-checkbox-group>
                </el-form-item>
              </el-form>
            </div>
            <el-button type="primary" @click="step = 1">上一步</el-button>
            <el-button type="success" @click="generateSkus">下一步：设置SKU信息</el-button>
          </el-card>
        </el-card>
      </el-col>
      <el-col :span="24" v-show="step==3">
        <el-card class="box-card" style="width:80%;margin:20px auto">
          <el-table :data="spu.skus" style="width: 100%">
            <el-table-column label="属性组合">
              <el-table-column
                :label="item.attrName"
                v-for="(item,index) in dataResp.tableAttrColumn"
                :key="item.attrId"
              >
                <template slot-scope="scope">
                  <span style="margin-left: 10px">{{ scope.row.attr[index].attrValue }}</span>
                </template>
              </el-table-column>
            </el-table-column>
            <el-table-column label="商品名称" prop="skuName">
              <template slot-scope="scope">
                <el-input v-model="scope.row.skuName"></el-input>
              </template>
            </el-table-column>
            <el-table-column label="标题" prop="skuTitle">
              <template slot-scope="scope">
                <el-input v-model="scope.row.skuTitle"></el-input>
              </template>
            </el-table-column>
            <el-table-column label="副标题" prop="skuSubtitle">
              <template slot-scope="scope">
                <el-input v-model="scope.row.skuSubtitle"></el-input>
              </template>
            </el-table-column>
            <el-table-column label="价格" prop="price">
              <template slot-scope="scope">
                <el-input v-model="scope.row.price"></el-input>
              </template>
            </el-table-column>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-row>
                  <el-col :span="24">
                    <label style="display:block;float:left">选择图集 或</label>
                    <multi-upload
                      style="float:left;margin-left:10px;"
                      :showFile="false"
                      :listType="'text'"
                      v-model="uploadImages"
                    ></multi-upload>
                  </el-col>
                  <el-col :span="24">
                    <el-divider></el-divider>
                  </el-col>
                  <el-col :span="24">
                    <el-card
                      style="width:170px;float:left;margin-left:15px;margin-top:15px;"
                      :body-style="{ padding: '0px' }"
                      v-for="(img,index) in spu.images"
                      :key="index"
                    >
                      <img :src="img" style="width:160px;height:120px"/>
                      <div style="padding: 14px;">
                        <el-row>
                          <el-col :span="12">
                            <el-checkbox
                              v-model="scope.row.images[index].imgUrl"
                              :true-label="img"
                              false-label
                            ></el-checkbox>
                          </el-col>
                          <el-col :span="12">
                            <el-tag v-if="scope.row.images[index].defaultImg == 1">
                              <input
                                type="radio"
                                checked
                                :name="scope.row.skuName"
                                @change="checkDefaultImg(scope.row,index,img)"
                              />设为默认
                            </el-tag>
                            <el-tag v-else>
                              <input
                                type="radio"
                                :name="scope.row.skuName"
                                @change="checkDefaultImg(scope.row,index,img)"
                              />设为默认
                            </el-tag>
                          </el-col>
                        </el-row>
                      </div>
                    </el-card>
                  </el-col>
                </el-row>
                <!-- 折扣，满减，会员价 -->
                <el-form :model="scope.row">
                  <el-row>
                    <el-col :span="24">
                      <el-form-item label="设置折扣">
                        <label>满</label>
                        <el-input-number
                          style="width:160px"
                          :min="0"
                          controls-position="right"
                          v-model="scope.row.fullCount"
                        ></el-input-number>
                        <label>件</label>

                        <label style="margin-left:15px;">打</label>
                        <el-input-number
                          style="width:160px"
                          v-model="scope.row.discount"
                          :precision="2"
                          :max="1"
                          :min="0"
                          :step="0.01"
                          controls-position="right"
                        ></el-input-number>
                        <label>折</label>
                        <el-checkbox
                          v-model="scope.row.countStatus"
                          :true-label="1"
                          :false-label="0"
                        >可叠加优惠
                        </el-checkbox>
                      </el-form-item>
                    </el-col>
                    <el-col :span="24">
                      <el-form-item label="设置满减">
                        <label>满</label>
                        <el-input-number
                          style="width:160px"
                          v-model="scope.row.fullPrice"
                          :step="100"
                          :min="0"
                          controls-position="right"
                        ></el-input-number>
                        <label>元</label>
                        <label style="margin-left:15px;">减</label>
                        <el-input-number
                          style="width:160px"
                          v-model="scope.row.reducePrice"
                          :step="10"
                          :min="0"
                          controls-position="right"
                        ></el-input-number>
                        <label>元</label>
                        <el-checkbox
                          v-model="scope.row.priceStatus"
                          :true-label="1"
                          :false-label="0"
                        >可叠加优惠
                        </el-checkbox>
                      </el-form-item>
                    </el-col>

                    <el-col :span="24">
                      <el-form-item label="设置会员价" v-if="scope.row.memberPrice.length>0">
                        <br/>
                        <!--   @change="handlePriceChange(scope,mpidx,$event)" -->
                        <el-form-item v-for="(mp,mpidx) in scope.row.memberPrice" :key="mp.id">
                          {{mp.name}}
                          <el-input-number
                            style="width:160px"
                            v-model="scope.row.memberPrice[mpidx].price"
                            :precision="2"
                            :min="0"
                            controls-position="right"
                          ></el-input-number>
                        </el-form-item>
                      </el-form-item>
                    </el-col>
                  </el-row>
                </el-form>
              </template>
            </el-table-column>
          </el-table>
          <el-button type="primary" @click="step = 2">上一步</el-button>
          <el-button type="success" @click="submitSkus">下一步：保存商品信息</el-button>
        </el-card>
      </el-col>
      <el-col :span="24" v-show="step==4">
        <el-card class="box-card" style="width:80%;margin:20px auto">
          <h1>保存成功</h1>
          <el-button type="primary" @click="addAgian">继续添加</el-button>
        </el-card>
      </el-col>
    </el-row>
  </div>
</template>

<script>
  //这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）
  //例如：import 《组件名称》 from '《组件路径》';
  import CategoryCascader from '../common/category-cascader'
  import BrandSelect from '../common/brand-select'
  import MultiUpload from '@/components/upload/multiUpload'

  export default {
    //import引入的组件需要注入到对象中才能使用
    components: {CategoryCascader, BrandSelect, MultiUpload},
    props: {},
    data () {
      return {
        catPathSub: null,
        brandIdSub: null,
        uploadDialogVisible: false,
        uploadImages: [],
        step: 0,
        //spu_name  spu_description  catalog_id  brand_id  weight  publish_status
        spu: {
          //要提交的数据
          spuName: '',
          spuDescription: '',
          catalogId: 0,
          brandId: '',
          weight: '',
          publishStatus: 0,
          decript: [], //商品详情
          images: [], //商品图集，最后sku也可以新增
          bounds: {
            //积分
            buyBounds: 0,
            growBounds: 0
          },
          baseAttrs: [], //基本属性
          skus: [] //所有sku信息
        },
        spuBaseInfoRules: {
          spuName: [
            {required: true, message: '请输入商品名字', trigger: 'blur'}
          ],
          spuDescription: [
            {required: true, message: '请编写一个简单描述', trigger: 'blur'}
          ],
          catalogId: [
            {required: true, message: '请选择一个分类', trigger: 'blur'}
          ],
          brandId: [
            {required: true, message: '请选择一个品牌', trigger: 'blur'}
          ],
          decript: [
            { required: true, message: "请上传商品详情图集", trigger: "blur" }
          ],
          images: [
            { required: true, message: "请上传商品图片集", trigger: "blur" }
          ],
          weight: [
            {
              type: 'number',
              required: true,
              message: '请填写正确的重量值',
              trigger: 'blur'
            }
          ]
        },
        dataResp: {
          //后台返回的所有数据
          attrGroups: [],
          baseAttrs: [],
          saleAttrs: [],
          tempSaleAttrs: [],
          tableAttrColumn: [],
          memberLevels: [],
          steped: [false, false, false, false, false]
        },
        inputVisible: [],
        inputValue: []
      }
    },
    //计算属性 类似于data概念
    computed: {},
    //监控data中的数据变化
    watch: {
      uploadImages (val) {
        //扩展每个skus里面的imgs选项
        let imgArr = Array.from(new Set(this.spu.images.concat(val)))

        //{imgUrl:"",defaultImg:0} 由于concat每次迭代上次，有很多重复。所以我们必须得到上次+这次的总长

        this.spu.skus.forEach((item, index) => {
          let len = imgArr.length - this.spu.skus[index].images.length //还差这么多
          if (len > 0) {
            let imgs = new Array(len)
            imgs = imgs.fill({imgUrl: '', defaultImg: 0})
            this.spu.skus[index].images = item.images.concat(imgs)
          }
        })

        this.spu.images = imgArr //去重
        console.log('this.spu.skus', this.spu.skus)
      }
    },
    //方法集合
    methods: {
      addAgian () {
        this.step = 0
        this.resetSpuData()
      },
      resetSpuData () {
        this.spu = {
          spuName: '',
          spuDescription: '',
          catalogId: 0,
          brandId: '',
          weight: '',
          publishStatus: 0,
          decript: [],
          images: [],
          bounds: {
            buyBounds: 0,
            growBounds: 0
          },
          baseAttrs: [],
          skus: []
        }
      },
      handlePriceChange (scope, mpidx, e) {
        this.spu.skus[scope.$index].memberPrice[mpidx].price = e
      },
      getMemberLevels () {
        this.$http({
          url: this.$http.adornUrl('/member/memberlevel/list'),
          method: 'get',
          params: this.$http.adornParams({
            page: 1,
            limit: 500
          })
        })
          .then(({data}) => {
            this.dataResp.memberLevels = data.page.list
          })
          .catch(e => {
            console.log(e)
          })
      },
      showInput (idx) {
        console.log('``````', this.view)
        this.inputVisible[idx].view = true
        // this.$refs['saveTagInput'+idx].$refs.input.focus();
      },
      checkDefaultImg (row, index, img) {
        console.log('默认图片', row, index)
        //这个图片被选中了，
        row.images[index].imgUrl = img //默认选中
        row.images[index].defaultImg = 1 //修改标志位;
        //修改其他人的标志位
        row.images.forEach((item, idx) => {
          if (idx != index) {
            row.images[idx].defaultImg = 0
          }
        })
      },
      handleInputConfirm (idx) {
        let inputValue = this.inputValue[idx].val
        if (inputValue) {
          // this.dynamicTags.push(inputValue);
          if (this.dataResp.saleAttrs[idx].valueSelect == '') {
            this.dataResp.saleAttrs[idx].valueSelect = inputValue
          } else {
            this.dataResp.saleAttrs[idx].valueSelect += ';' + inputValue
          }
        }
        this.inputVisible[idx].view = false
        this.inputValue[idx].val = ''
      },
      collectSpuBaseInfo () {
        //spuBaseForm
        this.$refs.spuBaseForm.validate(valid => {
          if (valid) {
            this.step = 1
            this.showBaseAttrs()
          } else {
            return false
          }
        })
      },
      generateSaleAttrs () {
        //把页面绑定的所有attr处理到spu里面,这一步都要做
        this.spu.baseAttrs = []
        this.dataResp.baseAttrs.forEach(item => {
          item.forEach(attr => {
            let {attrId, attrValues, showDesc} = attr
            //跳过没有录入值的属性
            if (attrValues != '') {
              if (attrValues instanceof Array) {
                //多个值用;隔开
                attrValues = attrValues.join(';')
              }
              this.spu.baseAttrs.push({attrId, attrValues, showDesc})
            }
          })
        })
        console.log('baseAttrs', this.spu.baseAttrs)
        this.step = 2
        this.getShowSaleAttr()
      },
      generateSkus () {
        this.step = 3

        //根据笛卡尔积运算进行生成sku
        let selectValues = []
        this.dataResp.tableAttrColumn = []
        this.dataResp.tempSaleAttrs.forEach(item => {
          if (item.attrValues.length > 0) {
            selectValues.push(item.attrValues)
            this.dataResp.tableAttrColumn.push(item)
          }
        })

        let descartes = this.descartes(selectValues)
        //[["黑色","6GB","移动"],["黑色","6GB","联通"],["黑色","8GB","移动"],["黑色","8GB","联通"],
        //["白色","6GB","移动"],["白色","6GB","联通"],["白色","8GB","移动"],["白色","8GB","联通"],
        //["蓝色","6GB","移动"],["蓝色","6GB","联通"],["蓝色","8GB","移动"],["蓝色","8GB","联通"]]
        console.log('生成的组合', JSON.stringify(descartes))
        //有多少descartes就有多少sku
        let skus = []

        descartes.forEach((descar, descaridx) => {
          let attrArray = [] //sku属性组
          descar.forEach((de, index) => {
            //构造saleAttr信息
            let saleAttrItem = {
              attrId: this.dataResp.tableAttrColumn[index].attrId,
              attrName: this.dataResp.tableAttrColumn[index].attrName,
              attrValue: de
            }
            attrArray.push(saleAttrItem)
          })
          //先初始化几个images，后面的上传还要加
          let imgs = []
          this.spu.images.forEach((img, idx) => {
            imgs.push({imgUrl: '', defaultImg: 0})
          })

          //会员价，也必须在循环里面生成，否则会导致数据绑定问题
          let memberPrices = []
          if (this.dataResp.memberLevels.length > 0) {
            for (let i = 0; i < this.dataResp.memberLevels.length; i++) {
              if (this.dataResp.memberLevels[i].priviledgeMemberPrice == 1) {
                memberPrices.push({
                  id: this.dataResp.memberLevels[i].id,
                  name: this.dataResp.memberLevels[i].name,
                  price: 0
                })
              }
            }
          }
          //;descaridx，判断如果之前有就用之前的值;
          let res = this.hasAndReturnSku(this.spu.skus, descar)
          if (res === null) {
            skus.push({
              attr: attrArray,
              skuName: this.spu.spuName + ' ' + descar.join(' '),
              price: 0,
              skuTitle: this.spu.spuName + ' ' + descar.join(' '),
              skuSubtitle: '',
              images: imgs,
              descar: descar,
              fullCount: 0,
              discount: 0,
              countStatus: 0,
              fullPrice: 0.0,
              reducePrice: 0.0,
              priceStatus: 0,
              memberPrice: new Array().concat(memberPrices)
            })
          } else {
            skus.push(res)
          }
        })
        this.spu.skus = skus
        console.log('结果!!!', this.spu.skus, this.dataResp.tableAttrColumn)
      },
      //判断如果包含之前的sku的descar组合，就返回这个sku的详细信息；
      hasAndReturnSku (skus, descar) {
        let res = null
        if (skus.length > 0) {
          for (let i = 0; i < skus.length; i++) {
            if (skus[i].descar.join(' ') == descar.join(' ')) {
              res = skus[i]
            }
          }
        }
        return res
      },
      getShowSaleAttr () {
        //获取当前分类可以使用的销售属性
        if (!this.dataResp.steped[1]) {
          this.$http({
            url: this.$http.adornUrl(
              `/product/attr/sale/list/${this.spu.catalogId}`
            ),
            method: 'get',
            params: this.$http.adornParams({
              page: 1,
              limit: 500
            })
          }).then(({data}) => {
            this.dataResp.saleAttrs = data.page.list
            data.page.list.forEach(item => {
              this.dataResp.tempSaleAttrs.push({
                attrId: item.attrId,
                attrValues: [],
                attrName: item.attrName
              })
              this.inputVisible.push({view: false})
              this.inputValue.push({val: ''})
            })
            this.dataResp.steped[1] = true
          })
        }
      },
      showBaseAttrs () {
        if (!this.dataResp.steped[0]) {
          this.$http({
            url: this.$http.adornUrl(
              `/product/attrgroup/${this.spu.catalogId}/withattr`
            ),
            method: 'get',
            params: this.$http.adornParams({})
          }).then(({data}) => {
            console.log(data.data)
            //先对表单的baseAttrs进行初始化
            data.data.forEach(item => {
              let attrArray = []
              if (!item.attrs) {
                return
              }
              item.attrs.forEach(attr => {
                attrArray.push({
                  attrId: attr.attrId,
                  attrValues: '',
                  showDesc: attr.showDesc
                })
              })
              this.dataResp.baseAttrs.push(attrArray)
            })
            this.dataResp.steped[0] = 0
            this.dataResp.attrGroups = data.data
          })
        }
      },

      submitSkus () {
        console.log('~~~~~', JSON.stringify(this.spu))
        this.$confirm('将要提交商品数据，需要一小段时间，是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        })
          .then(() => {
            this.$http({
              url: this.$http.adornUrl('/product/spuinfo/save'),
              method: 'post',
              data: this.$http.adornData(this.spu, false)
            }).then(({data}) => {
              if (data.code == 0) {
                this.$message({
                  type: 'success',
                  message: '新增商品成功!'
                })
                this.step = 4
              } else {
                this.$message({
                  type: 'error',
                  message: '保存失败，原因【' + data.msg + '】'
                })
              }
            })
          })
          .catch(e => {
            console.log(e)
            this.$message({
              type: 'info',
              message: '已取消'
            })
          })
      },
      //笛卡尔积运算
      descartes (list) {
        //parent上一级索引;count指针计数
        var point = {}

        var result = []
        var pIndex = null
        var tempCount = 0
        var temp = []

        //根据参数列生成指针对象
        for (var index in list) {
          if (typeof list[index] == 'object') {
            point[index] = {parent: pIndex, count: 0}
            pIndex = index
          }
        }

        //单维度数据结构直接返回
        if (pIndex == null) {
          return list
        }

        //动态生成笛卡尔积
        while (true) {
          for (var index in list) {
            tempCount = point[index]['count']
            temp.push(list[index][tempCount])
          }

          //压入结果数组
          result.push(temp)
          temp = []

          //检查指针最大值问题
          while (true) {
            if (point[index]['count'] + 1 >= list[index].length) {
              point[index]['count'] = 0
              pIndex = point[index]['parent']
              if (pIndex == null) {
                return result
              }

              //赋值parent进行再次检查
              index = pIndex
            } else {
              point[index]['count']++
              break
            }
          }
        }
      }
    },
    //生命周期 - 创建完成（可以访问当前this实例）
    created () {
    },
    //生命周期 - 挂载完成（可以访问DOM元素）
    mounted () {
      this.catPathSub = PubSub.subscribe('catPath', (msg, val) => {
        this.spu.catalogId = val[val.length - 1]
      })
      this.brandIdSub = PubSub.subscribe('brandId', (msg, val) => {
        this.spu.brandId = val
      })
      this.getMemberLevels()
    },
    beforeCreate () {
    }, //生命周期 - 创建之前
    beforeMount () {
    }, //生命周期 - 挂载之前
    beforeUpdate () {
    }, //生命周期 - 更新之前
    updated () {
    }, //生命周期 - 更新之后
    beforeDestroy () {
      PubSub.unsubscribe(this.catPathSub)
      PubSub.unsubscribe(this.brandIdSub)
    }, //生命周期 - 销毁之前
    destroyed () {
    }, //生命周期 - 销毁完成
    activated () {
    } //如果页面有keep-alive缓存功能，这个函数会触发
  }
</script>
<style scoped>
</

style

>
